Mac Pro Will Not Start Up!!!

[dglazzz]

MAC PRO 2.8 quad-core Intel
4 x 1GB
2 X 500GB 7200 ATA
ATI RAEDON HD 2600 XT 256MB dual link DVI
16X superdrive


computer froze today -- it was running fine this morning... i went to restart it and now it won't restart... no history of this happening before...

it will shut down if i force it -- but IT WILL NOT BOOT UP...

after i turn it on -- it starts up as normal with a chime and goes to the GREY SCREEN WITH THE APPLE LOGO and the SPINNING WHEEL...

but then the APPLE LOGO BECOMES A CIRCLE WITH A SLASH THROUGH (international "no" symbol) -- the SPINNING WHEEL REMAINS SPINNING...

and then it just stays like that wheel spinning and "no" symbol...

i've tried starting it holding down "shift", holding "option-command-p-r", holding "d", holding "c", and holding "option"... with the same results each time...

i ran DISK WARRIOR on all the disks... and tried staring up with no external drives...

and i've cleaned it thoroughly of dust...

PLEASE HELP!!!

THANK YOU!!!

 

[iBookG4user]

Can you boot from the Mac OS X disc?

 

[SDub90]

From the apple website:

Circle with Slash - could not load boot.efi, or some other issue

I would take an OS X disc and boot to that. Try reinstalling the OS and reformat the boot disk if you have to.

 

[DoFoT9]

definetely some sort of hard drive related error. archive and install maybe?